1 Introduction  
Preparing Your Multimeter
12 U1231A/U1232A/U1233A User’s Guide
Ensure that the Keysight logo on the U1173A IR- USB cable 
(purchased separately) connected to the multimeter is facing 
up. Firmly push the IR head into the multimeter’s IR 
communication port until it snaps into place (see 
Figure  1- 3).
Refer to the Keysight GUI Data Logger Software Help and 
Quick Start Guide for more information on the IR 
communication link and the Keysight GUI Data Logger 
software.
Figure 1-4 Keysight GUI Data Logger Software
The Keysight GUI Data Logger software and its supporting 
documents (Help and Quick Start Guide) are available as free 
downloads from http://www.keysight.com/find/hhTechLib. 
You may purchase a U1173A IR- USB cable from a Keysight 
Sales Office nearest to you.
Communication settings for U1231A/U1232A/U1233A
The baud rate, data bits, and parity bit are fixed respectively to 9600 bps, 
8-bit, and none for the U1231A/U1232A/U1233A handheld digital 
multimeter. Ensure that the communication settings on the Keysight GUI 
Data Logger match the communication settings mentioned in this note.